CN116183228B - Rolling bearing fault simulation test device - Google Patents

Rolling bearing fault simulation test device Download PDF

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Publication number
CN116183228B
CN116183228B CN202310215662.XA CN202310215662A CN116183228B CN 116183228 B CN116183228 B CN 116183228B CN 202310215662 A CN202310215662 A CN 202310215662A CN 116183228 B CN116183228 B CN 116183228B
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China
Prior art keywords
bearing
vibration
platform
rotating shaft
bearing seat
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CN116183228A (en
Inventor
李天鹏
梁海宏
刘奋军
周利成
胡津
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Yulin University
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Yulin University
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/04Bearings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01JMEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/48Thermography; Techniques using wholly visual means
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/04Bearings
    • G01M13/045Acoustic or vibration analysis
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation

Abstract

The application discloses a rolling bearing fault simulation test device which comprises a test bed, a sliding rail, a vibration platform and a vibration motor, wherein the two ends of the vibration platform along the axial direction of the sliding rail are connected with bases, the bases are in sliding fit on the sliding rail, the bases are connected with a bearing platform, the bearing platform is provided with a first motor, and the output end of the first motor is sequentially connected with a coupler, a first rotating shaft, a speed change mechanism, a second rotating shaft and a roller; the device also comprises a first bearing seat matched with the first rotating shaft and a second bearing seat matched with the second rotating shaft, wherein the first bearing seat and the second bearing seat are internally used for installing a test bearing; the device also comprises a vibration sensor arranged on the first bearing seat and the second bearing seat and a temperature monitoring device for monitoring the temperature of the test bearing. The application is used for more effectively simulating the working condition of the rocker arm cutting part of the coal mining machine and providing more accurate test parameters for the establishment of a fault diagnosis model.

Description

Rolling bearing fault simulation test device
Technical Field
The application relates to the field of bearings, in particular to a rolling bearing fault simulation test device.
Background
The electric traction coal mining machine is an important device for coal dropping and loading of a fully mechanized coal mining face of a coal mine, and is currently the core of the mechanized coal mining equipment of a modern mine in China. The production efficiency of the fully mechanized coal face is determined by the coal mining machine to a great extent, however, key parts of the coal mining machine are easy to damage due to a severe working environment, and the production safety of a coal mine is seriously affected. In the prior art, the electric traction coal mining machine has lower reliability and frequent faults, so that the research on key technologies of monitoring and fault diagnosis is urgent. The coal cutter cuts coal through picks arranged on a spiral roller, a front roller cuts top coal, a rear roller cuts bottom coal, a cutting part is a part of the coal cutter for directly dropping and loading coal, and the coal cutting operation of the coal cutter is completed by transmitting the motion and kinetic energy of a motor to the roller through a transmission system; the most vulnerable part of the rocker arm of the coal mining machine is the rolling bearing.
When the rolling bearing fails, the running performance of the coal mining machine is affected to different degrees, and the abnormal changes of physical quantities such as lubricating oil or equipment temperature, pressure, motor current, mechanical vibration and the like are represented. However, the working environment of the coal mining machine is very bad, so that pollution noise signals with very weak characteristics are necessarily obtained in fault diagnosis.
In the prior art, some devices for collecting vibration signals of the rolling bearing are also available, but most of the prior art collects vibration parameters of the bearing under static state, has single function, cannot simulate complex operation conditions of a cutting part of the coal mining machine, and is not suitable for a rocker arm fault simulation test of the coal mining machine.
Disclosure of Invention
The application provides a rolling bearing fault simulation test device, which aims to solve the problems that the prior art cannot simulate the complex operation condition of a cutting part of a coal mining machine and is not suitable for a rocker arm fault simulation test of the coal mining machine, realize more effective simulation of the working condition of the cutting part of the rocker arm of the coal mining machine, and provide more accurate test parameters for the establishment of a fault diagnosis model.
The application is realized by the following technical scheme:
the utility model provides a antifriction bearing trouble simulation test device, includes the test bench, set up slide rail, sliding fit on the slide rail vibration platform, be located vibration motor on the vibration platform, be used for driving the vibration platform is in gliding actuating mechanism on the slide rail, the vibration platform is all connected with the base along slide rail axial direction's both ends, base sliding fit is in on the slide rail, connect the loading platform on the base, install first motor on the loading platform, shaft coupling, first pivot, speed change mechanism, second pivot, cylinder are connected gradually to the output of first motor;
the test device also comprises a first bearing seat matched with the first rotating shaft and a second bearing seat matched with the second rotating shaft, wherein the first bearing seat and the second bearing seat are internally used for installing test bearings;
the device also comprises a vibration sensor arranged on the first bearing seat and the second bearing seat and a temperature monitoring device for monitoring the temperature of the test bearing.
Aiming at the problems that the prior art cannot simulate the complex operation condition of a cutting part of a coal mining machine and is not suitable for the rocker arm fault simulation test of the coal mining machine, the application provides a rolling bearing fault simulation test device. The sliding of the vibration platform is realized by the driving mechanism, and the bases on two sides are driven to synchronously slide. The driving mechanism can realize the sliding of the vibration platform through any existing driving mode, and the sliding is not limited herein. The application connects with the bearing platform on the base on both sides, the bearing platform and its upper part simulate the rocker arm of the coal mining machine together, the first motor outputs power on it, the front and back ends of the speed changing mechanism are connected with a rotating shaft respectively, and there are bearing seats matched with the rotating shaft, the test bearing is installed in the corresponding bearing seat, it can be matched with the corresponding rotating shaft. According to the application, the vibration conditions of the first bearing seat and the second bearing seat are monitored through the vibration sensor, and the temperature change condition of the test bearing is monitored through the temperature monitoring device, so that a basis is provided for building a fault diagnosis model.
When the application is specifically used, the test bearings are arranged in the first bearing seat and the second bearing seat at two sides, the driving mechanism is started, the first motor is started, and the first rotating shaft, the speed changing mechanism, the second rotating shaft, the roller, the test bearings and the like all start to move; the vibration platform and the bases on two sides are made to do linear motion on the sliding rail together, then the vibration motor is started, and then signals of the vibration sensors and the temperature monitoring devices are obtained in real time. The linear motion can be unidirectional motion or reciprocating motion. It can be seen that in the present application: (1) The vibration motor can provide required vibration frequency, so that rolling bearing vibration data under different external vibration conditions can be obtained; the vibration at two sides is transmitted to the base through the vibration platform and then transmitted to the bearing platform and the upper part of the bearing platform through the vibration platform, the vibration of the roller at any one side and the self vibration of the first motor can be transmitted to the other side through the bearing platform, the base and the like, so that the mutual influence working conditions of two cutting parts in the running process of the coal mining machine are effectively simulated; (2) The first bearing seat and the second bearing seat are respectively positioned at two sides of the speed change mechanism, so that signal parameters of the test bearing can be obtained when other working conditions are identical and only the rotating speeds are different, and more sample data are provided for the establishment of a fault diagnosis model; (3) The bearing platform can be in a motion state in the whole course in the test process so as to simulate the shaking or vibration brought by the advancing process of the coal mining machine, thereby overcoming the defect that the prior art can only collect static data; (4) The vertical loading can be carried out by the gravity of the roller, so that the actual running condition of the rolling bearing on the rocker arm of the coal mining machine is more met.
Further, the axes of the first rotating shaft and the second rotating shaft are parallel to the sliding rail, and the output ends of the first motors on the two bearing platforms deviate from each other; the axis of the second rotating shaft is perpendicular to the axis of the roller, and the second rotating shaft is connected with the roller through a reversing mechanism. The reversing mechanism may be any prior art that can be implemented by those skilled in the art, and will not be described herein.
Further, the base is connected with the bearing platform through at least two first telescopic devices distributed along a straight line, and the connecting line of each first telescopic device is parallel to the sliding rail; the bottom end of the first telescopic device is fixed on the base, and the top end of the first telescopic device is hinged with the bearing platform.
When the scheme is used, the heights of the first telescopic devices are adjusted, so that the heights of the first telescopic devices linearly rise or fall along the appointed direction, and the bearing platform can be inclined to drive all equipment on the bearing platform to be inclined together. In a specific test process, the bearing platform and all equipment on the bearing platform can swing in a reciprocating mode, so that the motion state of a rocker arm of the coal mining machine is simulated, the detected bearing is in multiple motion modes of swing, linear motion and vibration, the actual complex operation working condition of a cutting part of the coal mining machine is more met, the tested test parameters are more accurate, and the accuracy of a fault diagnosis model established subsequently is improved.
In addition, this scheme can make two cylinders upwards slope, downward sloping respectively to simulate respectively and cut the state of top coal, cutting the bottom coal, make the experimental operating mode more laminate actual operation condition.
Further, the cylinder includes the barrel, evenly sets up at the blind hole of barrel outer wall along circumference, activity place in counter weight subassembly in the blind hole, be used for shutoff the end cap of blind hole, the axial terminal surface of barrel sets up transparent portion, transparent portion is used for observing inside the blind hole, the axis of blind hole is along barrel radial direction.
In the prior art, the coal mining drum of a coal mining machine is generally of a spiral structure, and coal is cut through picks on the coal mining drum. The dimensional parameters of the upper helix may vary greatly from one shearer drum to another, which is manifested by a large variation in the load distribution across the shearer drums during the mining process, which is not evident in the prior art. Moreover, the prior art has not been able to radially simulate loading of the shearer drum. In order to overcome the problems, the scheme improves the roller, and a plurality of blind holes which are uniformly distributed in the circumferential direction are formed in the outer wall of the roller. Wherein, the outer wall of the cylinder body refers to the radially outward side wall of the cylinder body. The counterweight assembly can be flexibly taken and placed in the blind hole, and the blind hole is plugged by the plug, so that the mass distribution of the roller in all directions can be flexibly adjusted, and further different load distribution conditions and different distribution modes of coal mines on the coal mining roller can be simulated. In addition, the roller can continuously rotate in the test process, so that radial load can be applied to the roller body through the centrifugal force of each counterweight assembly, the defects of the prior art are further overcome, more and more complicated working condition simulation requirements can be met, and the functionality of the roller is further widened.
In addition, this scheme still sets up transparent portion at the axial terminal surface of barrel, and the blind hole is inside, and then position and quantity etc. of confirming the counter weight subassembly are observed through transparent portion to the convenience.
Further, two circles of blind holes corresponding to each other one by one are formed in the outer wall of the cylinder, and transparent parts are arranged on the end faces of two sides of the cylinder in the axial direction. Wherein, two circles of blind holes are distributed on two sides of the outer wall of the cylinder along the axial direction, and the two circles of blind holes are respectively observed by transparent parts on two sides. The two circles of blind holes are arranged to enable one side of the axial direction of the cylinder body to be heavier and the other side to be lighter as required, namely, the center of gravity of the cylinder body in the scheme can be eccentric on the end face and not centered in the axial direction, so that the bearing state of the coal mining roller during actual working is more met, more complicated working condition simulation requirements can be met, and the functionality of the coal mining roller is widened.
In addition, the one-to-one correspondence in this scheme means that two circles of blind holes are the mode distribution of aligning one by one in the axial to guarantee to satisfy this demand in a flexible way when needs focus is centered in the axial.
Further, the counterweight assembly comprises a counterweight block and a space occupying block, wherein the counterweight block and the space occupying block are matched with the section shape of the blind hole, and the space occupying block is of a hollow frame structure; an inner thread section is arranged on the inner wall of the orifice of the blind hole, and an external thread matched with the inner thread section is arranged on the outer wall of the plug; the length of the blind hole from the bottom of the hole to the internal thread section is equal to the multiple of N; wherein, N is the axial length of balancing weight and occupation piece.
In this solution, several counterweights and/or placeholders are placed in each blind hole, wherein the counterweights are used as their name implies to provide a larger mass, while the placeholders only occupy this position and the mass is smaller. According to the scheme, different weight balancing modes can be realized in each blind hole as required, various radial weight balancing requirements are met, and further different centrifugal forces are provided when the cylinder body rotates, so that the radial loading size of the application has extremely strong flexibility and adjustability. In addition, through the limiting of the connecting screw thread of the plug, the depth of the blind hole, the balancing weights and the length of the space occupying blocks, the plugs can be arranged after the balancing weights and/or the space occupying blocks with the specified number are arranged in the blind hole, and the plugs can limit the balancing weights and/or the space occupying blocks in the blind hole at the moment so as to ensure the stable positions of the balancing weights and/or the space occupying blocks in the radial direction and ensure the stability and reliability of the mass center of the roller in the test process.
Further, the device also comprises baffle plates positioned at two ends of the sliding rail, wherein a pressure sensing device is arranged on one side surface of the baffle plates facing the direction of the sliding rail, and the pressure sensing device comprises two flexible films and a plurality of first pressure sensors distributed in an array and clamped between the two flexible films.
In the working process of the coal mining machine, the rocker arm of the coal mining machine can also bear the reaction force of the stratum, and the existing technology cannot simulate the existence of the reaction force. In order to overcome this problem, this scheme still sets up the baffle at slide rail both ends, and when the cylinder moved to with the baffle contact, the cylinder was rolled on the baffle surface, through pressure sensing device response pressure, can monitor the reaction force to the cylinder, and then can also regard as one of the parameters of establishing fault diagnosis model with this reaction force, improves the accuracy of follow-up fault diagnosis model of establishing more.
In addition, the pressure sensing device in the scheme is characterized in that a plurality of first pressure sensors distributed in an array are clamped between two flexible films, so that the first pressure sensors can be protected from being damaged by the roller easily.
Further, a groove is formed in the surface of one side of the baffle, facing the direction of the sliding rail, and the pressure sensing device is arranged at the bottom of the groove; the groove wall of both sides of the groove is internally provided with a second telescopic device, the output end of the second telescopic device is rotationally connected with a rotary table, and a second pressure sensor is arranged between the rotary table and the output end of the second telescopic device.
In the application, the gravity center of the roller can be eccentric by adjusting the balancing weight, but the transverse acting force can not be applied to the whole of the first rotating shaft and the second rotating shaft at the output end of the motor. Therefore, the scheme is that the surface of the baffle is provided with the groove, the roller enters the groove and contacts with the groove bottom of the groove, then the second telescopic devices in the groove walls at two sides drive the rotary table to contact with the roller, the rotary table can rotate freely to adapt to the rotation of the roller, the output of the second telescopic devices is adjusted, the transverse acting force can be integrally applied to the first rotating shaft and the second rotating shaft at the output end of the motor, the magnitude of the acting force is monitored by the second pressure sensor, and further, the application can meet the requirements of more and more complex working condition simulation, and the functionality of the application is widened more.
Further, mounting grooves are formed in two opposite sides of the vibration platform, and each mounting groove is provided with an extension part extending towards the inner direction of the vibration platform; the base is fixedly connected with a rack, the rack is parallel to the sliding rail, the rack is meshed with the gear, and the base further comprises a second motor for driving the gear to rotate; the second motor and the gear are both positioned in the mounting groove, and the rack can enter the extension part.
In order to enable the rollers at the two sides to simulate coal mining working conditions and receive reaction force at the same time, the scheme optimizes the connection mode between the vibration platform and the base, and enables the vibration platform and the base to be connected through a gear rack mechanism; secondly, the structure can effectively ensure the effective transmission of vibration, and avoid the defect that equipment is easily damaged by vibration when the electric push rod and the like are directly used for connection.
Further, the device also comprises a cross beam erected between the two end baffles; the temperature monitoring device comprises a plurality of third telescopic devices connected to the cross beam and a thermal infrared camera connected to the third telescopic devices.
The inventor also finds that in the research process, the temperature monitoring of the bearing fault test in the prior art is generally realized by adopting a single-point temperature sensor such as a thermocouple and the like, and the defect is that the temperature distribution and the change condition of the test bearing on the whole end face cannot be obtained effectively. In order to overcome the problem, the transverse beam is erected between the baffles at two sides by combining the specific structure of the device, and the thermal infrared cameras are driven to move downwards by the third telescopic devices connected to the transverse beam, so that the thermal infrared cameras are in one-to-one correspondence with the test bearings. When the temperature needs to be monitored, the third telescopic device drives the thermal infrared camera to descend to a position capable of completely shooting a corresponding test bearing, so that the overall temperature distribution and the change condition of the end face of the bearing can be monitored in the test process, and more reliable sample data are provided for the establishment of a subsequent fault diagnosis model.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. according to the rolling bearing fault simulation test device, required vibration frequency can be provided through the vibration motor, so that rolling bearing vibration data under different external vibration conditions can be obtained; and the vibration at both sides is transmitted to the base through the vibration platform, and then is transmitted to the bearing platform and the upper part thereof through the base, so that the mutual influence working conditions of the two cutting parts in the running process of the coal mining machine are effectively simulated.
2. The rolling bearing fault simulation test device can obtain signal parameters of the test bearing when other working conditions are identical and only the rotating speeds are different, and provides more sample data for the establishment of a fault diagnosis model.
3. The rolling bearing fault simulation test device can simulate shaking or vibration caused by the advancing process of the coal mining machine, and overcomes the defect that the prior art can only collect static data; the vertical loading can be carried out by the gravity of the roller, so that the actual running condition of the rolling bearing on the rocker arm of the coal mining machine is more met.
4. The rolling bearing fault simulation test device can enable the bearing platform and all equipment on the bearing platform to swing in a reciprocating mode, further simulate the motion state of a rocker arm of a coal mining machine, enable a tested bearing to be in multiple motion modes of swing, linear motion and vibration, be more in line with the actual complex operation working condition of a cutting part of the coal mining machine, enable tested parameters to be more accurate, and be beneficial to improving the accuracy of a fault diagnosis model established subsequently.
5. According to the rolling bearing fault simulation test device, radial load can be applied to the cylinder body through the centrifugal force of each counterweight assembly, so that the defects of the prior art are overcome; in addition, the center of gravity of the cylinder body can be eccentric on the end face and not centered in the axial direction, so that the cylinder body is more in line with the bearing state of the coal mining roller during actual working, more complex working condition simulation requirements can be met, and the functionality of the cylinder body is widened.
6. According to the rolling bearing fault simulation test device, different weight balancing modes can be realized in each blind hole according to the requirements, so that various radial weight balancing requirements are met, and further, different centrifugal forces are provided when the cylinder body rotates, so that the radial loading size of the rolling bearing fault simulation test device is extremely high in flexibility and adjustability.
7. The application relates to a rolling bearing fault simulation test device, which can monitor the reaction force to a roller, and further can take the reaction force as one of parameters for establishing a fault diagnosis model; it is also possible to apply a transverse force to the shaft as a whole.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a front view of an embodiment of the present application;
FIG. 2 is a cross-sectional view of a drum in an embodiment of the present application;
FIG. 3 is a schematic view of a drum according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a counterweight according to an embodiment of the application;
FIG. 5 is a schematic view of a structure of a space block according to an embodiment of the present application;
FIG. 6 is a schematic structural diagram of a plug according to an embodiment of the present application;
FIG. 7 is a cross-sectional view of a baffle in an embodiment of the present application;
FIG. 8 is a schematic view of a baffle plate according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a pressure sensing device according to an embodiment of the present application;
FIG. 10 is another front view of an embodiment of the present application;
fig. 11 is a cross-sectional view showing the connection of the vibration table to the base in an embodiment of the present application.
In the drawings, the reference numerals and corresponding part names:
the device comprises a test bed, a 2-sliding rail, a 3-vibration platform, a 4-base, a 5-bearing platform, a 6-first motor, a 7-coupler, an 8-first rotating shaft, a 9-speed change mechanism, a 10-second rotating shaft, a 11-roller, a 111-cylinder, a 112-blind hole, a 113-plug, a 114-transparent part, a 115-balancing weight, a 116-occupying block, a 12-second bearing, a 13-test bearing, a 14-reversing mechanism, a 15-first telescoping device, a 16-baffle, a 17-pressure sensing device, a 18-groove, a 19-second telescoping device, a 20-turntable, a 21-second pressure sensor, a 22-mounting groove, a 23-extension part, a 24-rack, a 25-gear, a 26-second motor, a 27-beam, a 28-third telescoping device, a 29-thermal infrared camera, a 30-vibration motor and a 31-first bearing seat.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application. In the description of the present application, it should be understood that the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the scope of the present application.
Example 1:
the rolling bearing fault simulation test device shown in fig. 1 comprises a test bed 1, wherein a sliding rail 2, a vibrating platform 3 in sliding fit with the sliding rail 2, a vibrating motor 30 positioned on the vibrating platform 3, and a driving mechanism for driving the vibrating platform 3 to slide on the sliding rail are arranged on the test bed 1, the two ends of the vibrating platform 3 along the axial direction of the sliding rail 2 are connected with a base 4, the base 4 is in sliding fit with the sliding rail 2, a bearing platform 5 is connected onto the base 4, a first motor 6 is mounted on the bearing platform 5, and the output end of the first motor 6 is sequentially connected with a coupler 7, a first rotating shaft 8, a speed change mechanism 9, a second rotating shaft 10 and a roller 11;
the device further comprises a first bearing seat 31 matched with the first rotating shaft 8 and a second bearing seat 12 matched with the second rotating shaft 10, wherein the first bearing seat 31 and the second bearing seat 12 are internally provided with a test bearing 13;
and further comprises vibration sensors mounted on the first bearing seat 31 and the second bearing seat 12 and a temperature monitoring device for monitoring the temperature of the test bearing 13.
In this embodiment, the axes of the first rotating shaft 8 and the second rotating shaft 10 are parallel to the sliding rail 2, and the output ends of the first motors 6 on the two bearing platforms 5 are opposite to each other; the axis of the second rotating shaft 10 is perpendicular to the axis of the roller 11, and the second rotating shaft 10 is connected with the roller 11 through a reversing mechanism 14.
The base 4 is connected with the bearing platform 5 through two first telescopic devices 15 distributed along a straight line, and the connecting lines of the two first telescopic devices 15 are parallel to the sliding rail 2; the bottom end of the first telescopic device 15 is fixed on the base 4, and the top end of the first telescopic device 15 is hinged with the bearing platform 5.
Preferably, the first bearing seat 31 and the second bearing seat 12 can both use the existing split structure, so that the test bearing can be conveniently installed.
Preferably, the speed change mechanism 9 is a gear reducer.
Preferably, the reversing mechanism 14 employs intermeshing bevel gear sets.
Example 2:
a rolling bearing failure simulation test apparatus according to embodiment 1, in which a roller 11 is shown in fig. 2 to 6, includes:
barrel 111, evenly set up at the blind hole 112 of barrel 111 outer wall along circumference, activity place in the counter weight subassembly in the blind hole 112, be used for shutoff blind hole 112's end cap 113, barrel 111's axial terminal surface sets up transparent portion 114, transparent portion 114 is used for observing inside the blind hole 112, the axis of blind hole 112 is along barrel 111 radial direction.
In this embodiment, two circles of blind holes 112 corresponding to each other are formed in the outer wall of the cylinder 111, and transparent portions 114 are disposed on two axial side end surfaces of the cylinder 111.
The counterweight assembly comprises a counterweight 115 and a space occupying block 116, wherein the counterweight 115 and the space occupying block 116 are matched with the cross section shape of the blind hole 112, and the space occupying block 116 is of a hollow frame structure; an inner thread section is arranged on the inner wall of the orifice of the blind hole 112, and an external thread matched with the inner thread section is arranged on the outer wall of the plug 113; the length of the blind hole 112 from the bottom of the hole to the internal thread section is equal to a multiple of N; where N is the axial length of the weight 115 and the placeholder 116.
In this embodiment, the balancing weight is made of solid stainless steel, and the occupying block is made of aluminum alloy.
Preferably, the plug 113 is provided with a straight slot or a cross slot, so that the plug can be conveniently rotated for taking and placing.
Example 3:
the rolling bearing fault simulation test device further comprises baffle plates 16 positioned at two ends of the sliding rail 2 on the basis of any embodiment, wherein a pressure sensing device 17 is arranged on one side surface of the baffle plates 16 facing the direction of the sliding rail 2, and the pressure sensing device 17 comprises two flexible films and a plurality of first pressure sensors distributed in an array and clamped between the two flexible films.
The pressure sensing device 17 in this embodiment is shown in fig. 9.
In this embodiment, as shown in fig. 7 and 8, the baffle 16 is provided with a groove 18 on a surface of one side facing the direction of the sliding rail 2, and the pressure sensing device 17 is disposed at the bottom of the groove 18; the groove walls on two sides of the groove 18 are respectively provided with a second telescopic device 19, the output end of each second telescopic device 19 is rotationally connected with a rotary table 20, and a second pressure sensor 21 is arranged between each rotary table 20 and the output end of each second telescopic device 19.
In a more preferred embodiment, as shown in fig. 10, a cross member 27 is also included that spans between the end baffles 16; the temperature monitoring device comprises a plurality of third telescopic devices 28 connected to the cross beam 27 and a thermal infrared camera 29 connected to the third telescopic devices 28.
In a more preferred embodiment, as shown in fig. 11, the two opposite sides of the vibration platform 3 are provided with mounting grooves 22, and the mounting grooves 22 have extending parts 23 extending toward the inner direction of the vibration platform 3; the base 4 is fixedly connected with a rack 24, the rack 24 is parallel to the slide rail 2, the rack 24 is meshed with a gear 25, and the base further comprises a second motor 26 for driving the gear 25 to rotate; the second motor 26 and the gear 25 are both positioned in the mounting groove 22, and the rack 24 can enter the extension 23.
In this embodiment, the baffle is fixed to the test stand 1.
Preferably, the thickness of the flexible film in this embodiment is relatively thin, typically 3-5 mm.
Preferably, the vibration platform 3 and the base 4 are connected through a screw mechanism in addition to a rack-and-pinion mechanism.
Preferably, the mounting grooves and extensions on both sides of the vibration table 3 are staggered in the lateral direction to avoid interference with each other.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, the term "coupled" as used herein may be directly coupled or indirectly coupled via other components, unless otherwise indicated.

Claims (6)

1. The utility model provides a antifriction bearing fault simulation test device, includes test bench (1), its characterized in that, set up slide rail (2), sliding fit on test bench (1) vibration platform (3) on slide rail (2), be located vibration motor (30) on vibration platform (3), be used for the drive vibration platform (3) be in gliding actuating mechanism on the slide rail, vibration platform (3) are all connected with base (4) along slide rail (2) axial direction's both ends, base (4) sliding fit is in on slide rail (2), connect loading platform (5) on base (4), install first motor (6) on loading platform (5), the output of first motor (6) connects gradually shaft coupling (7), first pivot (8), speed change mechanism (9), second pivot (10), cylinder (11);
the device further comprises a first bearing seat (31) matched with the first rotating shaft (8) and a second bearing seat (12) matched with the second rotating shaft (10), wherein the first bearing seat (31) and the second bearing seat (12) are internally provided with a test bearing (13);
the device also comprises a vibration sensor and a temperature monitoring device, wherein the vibration sensor is arranged on the first bearing seat (31) and the second bearing seat (12), and the temperature monitoring device is used for monitoring the temperature of the test bearing (13);
the axes of the first rotating shaft (8) and the second rotating shaft (10) are parallel to the sliding rail (2), and the output ends of the first motors (6) on the two bearing platforms (5) are mutually deviated; the axis of the second rotating shaft (10) is perpendicular to the axis of the roller (11), and the second rotating shaft (10) is connected with the roller (11) through a reversing mechanism (14);
the base (4) is connected with the bearing platform (5) through at least two first telescopic devices (15) distributed along a straight line, and the connecting line of each first telescopic device (15) is parallel to the sliding rail (2); the bottom end of the first telescopic device (15) is fixed on the base (4), and the top end of the first telescopic device (15) is hinged with the bearing platform (5);
the rotary drum (11) comprises a drum body (111), blind holes (112) uniformly formed in the outer wall of the drum body (111) along the circumferential direction, counterweight components movably arranged in the blind holes (112) and plugs (113) for plugging the blind holes (112), a transparent part (114) is arranged on the axial end face of the drum body (111), the transparent part (114) is used for observing the inside of the blind holes (112), and the axis of the blind holes (112) is along the radial direction of the drum body (111);
the counterweight assembly comprises a counterweight block (115) and a space occupying block (116) which are matched with the cross section shape of the blind hole (112), and the space occupying block (116) is of a hollow frame structure; an inner thread section is arranged on the inner wall of the orifice of the blind hole (112), and an external thread matched with the inner thread section is arranged on the outer wall of the plug (113); the length of the blind hole (112) from the bottom of the hole to the internal thread section is equal to the multiple of N; wherein N is the axial length of the balancing weight (115) and the occupying block (116).
2. The rolling bearing fault simulation test device according to claim 1, wherein two circles of blind holes (112) corresponding to each other are formed in the outer wall of the cylinder (111), and transparent parts (114) are arranged on two axial side end surfaces of the cylinder (111); the one-to-one correspondence means that the two circles of blind holes are distributed in an aligned mode one by one in the axial direction.
3. The rolling bearing fault simulation test device according to claim 1, further comprising baffle plates (16) positioned at two ends of the sliding rail (2), wherein a pressure sensing device (17) is arranged on one side surface of the baffle plates (16) facing the direction of the sliding rail (2), and the pressure sensing device (17) comprises two flexible films and a plurality of first pressure sensors distributed in an array and clamped between the two flexible films.
4. A rolling bearing fault simulation test device according to claim 3, wherein a groove (18) is formed in the surface of one side of the baffle (16) facing the direction of the sliding rail (2), and the pressure sensing device (17) is arranged at the bottom of the groove (18); the groove wall of the groove (18) is internally provided with a second telescopic device (19), the output end of the second telescopic device (19) is rotationally connected with a rotary table (20), and a second pressure sensor (21) is arranged between the rotary table (20) and the output end of the second telescopic device (19).
5. A rolling bearing fault simulation test device according to claim 3, characterized in that mounting grooves (22) are formed in opposite sides of the vibration platform (3), and the mounting grooves (22) are provided with extension parts (23) extending towards the inner direction of the vibration platform (3); the base (4) is fixedly connected with a rack (24), the rack (24) is parallel to the sliding rail (2), the rack (24) is meshed with a gear (25), and the base further comprises a second motor (26) for driving the gear (25) to rotate; the second motor (26) and the gear (25) are both positioned in the mounting groove (22), and the rack (24) can enter the extension part (23).
6. A rolling bearing failure simulation test apparatus according to claim 3, further comprising a cross member (27) erected between the end baffles (16); the temperature monitoring device comprises a plurality of third telescopic devices (28) connected to the cross beam (27), and a thermal infrared camera (29) connected to the third telescopic devices (28); the thermal infrared cameras are in one-to-one correspondence with the test bearings.
CN202310215662.XA 2023-03-07 2023-03-07 Rolling bearing fault simulation test device Active CN116183228B (en)

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